Java Increment / Decrement Operators - How they behave, what's the functionality?

Question

It\'s been 3 days since I start to learn Java. I have this program and I don\'t understand code in main method with ++ and -- operator

Answer 1

++ and -- are called increment and decrement operators. They are shortcuts for writing x = x+1 (x+=1) / x = x-1 (x-=1). (assumed that x is a numeric variable)

In rare cases you could worry about the precedence of the incrementation/decrementation and the value the expression returns: Writing ++x it means "increment first, then return", whereas x++ means "return first, then increment". Here we can distinguish between pre- and post increment/decrement operators.